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PNT6450A 1300MHz至6000MHz 信号与频谱分析仪 详细指标
Take the real-world RF environment back to the lab and replay it whenever you need
一、GSS6450 Hardware & 软件选件（表 1）
Product Elements Options With 10 MHz
With 30 MHz
With 30 /50 MHz
Record and Playback (Standard, Inmarsat)
Constellations 10 MHz 30 MHz
30/50 MHz
GNSS Constellation 频段 (中心频率 MHz) (选件)
complete list of constellations that can be recorded at selected center frequency and
GPS, GAL, BEI L1
1561.098
1575.42
GPS, GAL, GLO L1
1575.42
1602.018 NA NA
BEI L1
1561.098
1575.42
1602.018
1567.236
1561.098
1575.42
1602.018
1575.42
1583.604
1591.788
GPS L1, L2
1575.42
1575.42
1227.60
1575.42
1227.6
GPS L1, L5
1575.42
1176.45
1575.42
1176.45
1575.42
GNSS L1, L2, L5, B3
1561.098
1575.42
1602.018
1176.45
1207.14
1227.60
1246.014
1268.52
1561.098
1567.236
1575.42
1602.018
1176.45
1191.795
1239.876
1268.52
1575.42
1583.604
1591.788
Product Elements Options With 10 MHz
With 30 MHz
With 30 /50 MHz
GNSS L1, L2, L5, B3, E6 Please contact Keysight for more information.
Inmarsat based augmentations 1536.00
1536.00
Bandwidth (option) 30 MHz
30 and 50 MHz
30,50,60 and 80 MHz
RF2 Enable RF2
690-2400 MHz
GNSS frequencies only available if purchased above
条件：IQ calibration at specific frequencies is required for accurate operation.
contact Keysight for any other configurations required, including recording Galileo E6 .
4. For complete flexibility (in most cases) you can upgrade the GSS6450 using a software key,
5. Overall product configurations and recording options are subject to the throughput
6. If you want to record Inmarsat based augmentation systems (Starfire, Terrastar and so on)
7. If option S (30,50,60,80 MHz bandwidth is purchased) then it is available on RF1, RF2 and
RF3 Enable RF3
470 – 6000 MHz
Notes: 1. Limited to 80 MHz bandwidth total 2. GNSS frequencies only available if purchased above
3. IQ calibration at specific frequencies is required for
accurate operation. 4. Cannot set center frequencies in the following ranges 988.0 - 1006.6 MHz
1159.0 - 1168.0 MHz
1193.0 - 1199.0 MHz
1290.0 - 1370.0 MHz
1491.0 - 1500.0 MHz
1545.0 - 1558.0 MHz
1975.0 - 2014.0 MHz
Notes: 1. Constellation band options G and H can record at 10 MHz only . 2. With constellation band options G, H, J and K, you can simultaneously record and playback up to two RF center frequencies. With options I, L, M and N you can record and playback up
to four RF center frequencies. 3. You need 30 MHz (or
30 and 50 MHz) bandwidth options for constellation band options J, K
L, N and O, although you can choose
10 MHz bandwidths on the indicated signals. Please
you do not need to return your GSS6450 to Keysight for upgrades.
constraints detailed in Table
5.
you need Base Chassis C, D or F. You must also purchase the ‘Inmarsat based
augmentations’ Option N, and the 30 MHz bandwidth option Q, or the
30/50 MHz bandwidth
option R. You cannot use these systems to record BeiDou B3, QZSS L6, or Galileo E6 signals
on RF1.
RF3 (if these port options have been purchased). Two
60 or 80 MHz bandwidth GNSS
frequencies become available with this option. They are centered on L1 at 1583.604 MHz and
L5 at 1191.795 MHz for 60 MHz or L1 at 1583.604 MHz and L2 -L5 at 1199.979 MHz for 80
条件：MHz bandwidth, and Advanced 56 dB dynamic range, you will need to order a system as follows:
To order an RPS GSS6450 system that can record GPS L1, GLONASS L1 RF signals with 10 and 30
• Option A: Record and playback hardware (Advanced)
• Option I: GPS L1 and GLONASS L1 constellation license
• Option Q
30 MHz bandwidth
条件：under one part number — please discuss with your Keysight representative.
Some of the more common product configurations have been bundled and can be purchased
二、GNSS Frequencies and Constellations Supported on RF1（表 2）
Item Center Frequency, MHz Constellations Supported Bandwidth, MHz
1176.45
GPS L5
Galileo E5a
QZSS L5
SBAS L5
30 or 50
2 1227.6
GPS L2 (L2c, P(Y) and M)
QZSS L2c
** Note: the
50 MHz setting does not cover GLONASS L2
3 1246.014 GLONASS L2 (C/A and P)
30
4 1583.604
GPS L1 (C/A, P(Y), L1c and M)
Galileo E1 (B and C, with CBOC)
QZSS L1 (C/A, SAIF, L1c with TMBOC)
SBAS L1 (WAAS, EGNOS, MSAS, GAGAN)
GLONASS L1 (C/A and P)**
BeiDou B1
** Note: you may notice up to 2 dB signal degradation on the
upper channels of the L1 GLONASS signal with the
50MHz setting
5 1591.788
GPS L1 (C/A, P(Y), L1c and M)
Galileo E1 (B and C, with CBOC)**
QZSS L1 (C/A, SAIF,
L1c with TMBOC)
SBAS L1 (WAAS, EGNOS, MSAS, GAGAN)
GLONASS L1 (C/A and P)
** Note: you may notice up to 2 dB signal degradation on the E1
GPS L2 (L2c, P(Y) and M)
QZSS L2c
GLONASS L2 (C/A and P)
Item Center Frequency, MHz Constellations Supported Bandwidth, MHz
7 1561.098 BeiDou B1
10 or 30
8 1575.42
GPS L1 (C/A, L1c – BOC(1,1) only)
Galileo E1 (B and C, BOC(1,1) only)
QZSS L1 (C/A, SAIF,
L1c – BOC(1,1) only)
SBAS L1 (WAAS, EGNOS, MSAS, GAGAN)
GPS L1 (C/A, P(Y), L1c and M)
Galileo E1 (B and C, with CBOC)
QZSS L1 (C/A, SAIF,
L1c with TMBOC)
SBAS L1 (WAAS, EGNOS, MSAS, GAGAN)
GPS L1 (C/A, P(Y), L1c and M)
Galileo E1 (B and C, with CBOC)
QZSS L1 (C/A, SAIF,
L1c with TMBOC)
SBAS L1 (WAAS, EGNOS, MSAS, GAGAN)
BeiDou B1
9 1602.018 GLONASS L1 (C/A)
10
BeiDou B2b
Galileo E5b
GLONASS L3
GPS L1 (C/A, L1c)
BeiDou B1
Galileo E1 (B and C, with CBOC)
QZSS L1 (C/A, SAIF,
L1c – BOC (1,1) only)
SBAS L1 (WAAS, EGNOS, MSAS, GAGAN)
12 1268.52 BeiDou B3
30 or 50
BeiDou B2
Galileo E5 (E5a +E5b)
GLONASS L3
GPS L5
QZSS L5
SBAS L5
GPS L2 (80MHz only)
** Note: at 50 MHz this setting is optimized for Galileo E5ab, there
may be minor degradation on the other signals. With the
80MHz
setting the center frequency is moved to 1199.979 MHz to capture
GPS L2
Inmarsat based SBAS (such as Omnistar, Terrastar and Starfire)**
条件：IRNSS S Band centered on 2491.005 MHz can be recorded at 50 MHz bandwidth on RF3.
The
50MHz setting is present to facilitate the recording of
Inmarsat signals along with other signals at 50MHz. However, the
recording is actually limited by the filter which has a bandwidth of
35MHz. This is to ensure there is no overlap into the Beidou band.
If purchased it is then not possible to record Beidou B3, QZSS L6
or Galileo E6 on RF1.
30 or 50
15 1278.75 QZSS L6
30 or 50
The GSS6450 is extremely flexible in operation and can be operated:
• Wirelessly from a PC, tablet or smartphone, or via USB tethering
This flexibility caters for a range of situations from simple one -touch record operation for
collecting field data to manufacturing operations where multiple GSS6450s can be monitored and
controlled from a single PC over a standard Ethernet network.
条件：You can control most of the GSS6450 functions using the front panel touchscreen LCD display:
• 2.4" LCD-TFT display graphics
• 240 x
320 VGA resolution, RGB touch screen
Figure
6. GSS6450 RPS main screen
• Start and stop playing and recording of files
• File management actions, such as deleting files or monitoring disk usage
• Ability to control location of recording and transfer of data
• Choose number of frequencies to record on RF1, RF2 or RF3
• Adjusting 设置, such as 衰减器
• Monitoring status, such as system status, battery level, IP address and software version
• Controlling asynchronous logging on each channel or synchronous logging
• Powering and shutting down the system
• Choosing antenna voltage (3.3 Volts
5 Volts or off) on RF1
• View the GPS/Galileo/GLONASS/BeiDou status of the internal receiver
• Single press “instant” record by holding down the “Start Record”
When the GSS6450 is connected to a network the dynamically assigned IP address can be viewed
on the front panel display by navigating to the appropriate status screen using the front panel
条件：headings brings up the sub-pages that allow you to control and configu re the GSS6450.
Then, using any suitable browser, you can navigate to the home page at the given IP address. The
GSS6450 top level menus are then available on the Home page. Clicking on the appropriate
You can also attach a display, keyboard and mouse to access the WebServer. With the optional
Wi-Fi dongle, you can control the GSS6450 from any Wi-Fi enabled platform, such as a PDA or
条件：the number of repetitions, alter the attenuation, or start or stop time within the file.
The web server lets you perform a full range of operations, including configuring the GSS6450,
managing files, transferring files between internal and external SSDs, controlling record and
playback, adjusting attenuation settings, or changing the local tim e.
Figure
7. Built-in web-server main menu page
Additional features available through the web server include switching on or off a particular signal
during playback, playing back part way into a file, or setting up a batch replay mode. Batch replay
mode allows the setting up of a number of files to play back, and for each file the user can choose
Sample web server screenshots
Figure
8. Sample web server screenshots
Spectrum Analysis Software
The spectrum analysis software built into the GSS6450 allows the user to see the real time
spectrum of the signals either during record or playback. The user can switch between the
In this mode no signals are recorded, and the RF spectrum of the Live sky is given. The resolution
is automatically set to the highest dynamic range based on the bandwidth, and the RF spectrum
条件：operating a throughput of 160 MBps is the maximum allowable rate per c hannel.
In this mode the signals are recorded onto the drives at the same time as showing the spectrum of
the recorded signals. The dynamic range and signals are as set on the Record page. When
During playback, the display is dictated by the bandwidth and dynamic range at which the signals
Figure
9. Spectrum analysis
The spectrum analysis software is available through the web server at a refresh rate of 1 frame
every 2 seconds. The spectrum analysis real -time display tool is available from the Linux desktop
which gives a faster update rate and provides additional tools such as taking a snapshot of the
You can manage the GSS6450 RPS over a network using its internal VNC server, rather than
connecting an external monitor, keyboard, and mouse. VNC is a powerful, easy to use and free
software application that uses a network (or internet) connection to displ ay the screen of one
computer on a second, remote computer
The VNC application lets you use the mouse and keyboard of the remote computer to control the
in-built Linux PC of the GSS6450, giving you the flexibility to control the GSS6450 RPS from a
To use the VNC connection you need to install a suitable VNC viewer on the remote computer. The
VNC access allows you to manage your GSS6450 as local user, such as performing software
Table
3 shows estimated recording times.
三、Estimated Recording Times per Terabyte（表 3）
编号 Frequencies recorded (标配动态范围)
Available Recording time (hours) 10 MHz 30M Hz 50 MHz 60 MHz 80 MHz 1 50 16 10 8
6.25
Number of Frequencies recorded (Advanced dynamic range)
Available Recording time (hours) 10 MHz 30 MHz 50 MHz 60 MHz 80 MHz 1 25 8 5 4
3.4
编号 Frequencies recorded (高动态范围)
Available Recording time (hours) 10 MHz 30 MHz 50 MHz 60 MHz 80 MHz 1 12.5 4 2.5 2
1.56
As standard, the GSS6450 is supplied with a
2TB internal SSD drive. Removable external SSD of 1
2, 4 or 7.5TB can be purchased. 8TB
15TB or 80TB RAID drives are available, also connected by
USB3. These can be used for record/playback or data storage.
Keysight supplies each GSS6450 with its own FTP Server and Client. This allows fast transfer of
• Attenuation Table (slope of the attenuation curve)
• Synchronous data recording using 0 bits (off)
1 or 2 bit stream recording
• Asynchronous Serial Port Communications Settings (baud), and assumes n,8,1
• Repeat in a continuous loop
条件：A ‘Trigger’ feature lets the GSS6450 start recording or playing back based on an external pulse.
You can use two GSS6450 connected in host/agent mode, which lets you record more signals.
The synchronization between two GSS6450 is better than
5 nanoseconds.
四、Data Recording File Formats Supported by the GSS6450（表 4）
Data Type Description File Extension
GNSS Signals (GSS6450) GSS6450 stored GNSS data .A.gns
GNSS Signals (GSS6425) Compatibility mode for playback of GSS6425 files .gns
Serial Data Data presented on the COM
1 port .com1
Video Capture Webcam video sources (0 to 3) captured in compressed MPG file format .mpg
Scenario file Information about the recording .scn
AGC file Stores the AGC levels detected during recording .agc
NMEA Store the NMEA data from the internal receiver during recording .nmea
NMEA Store the NMEA data from the internal receiver during playback .nmeaplay
Keysight will supply the format of the digitized data on request for direct access or decoding of
条件：product is put into service and first used. The recommended calibration interval is 12 months.
The GSS6450 is calibrated to the ISO/IEC
17025 standard at the time of purchase. We have
determined that the calibration of this product is not affected by storage of up to 180 days prior to
its initial receipt by the customer. The recalibration of this un it should be based on when the
Annual re-calibration must be carried out at a Keysight facility or accredited laboratory to maintain
条件：how to renew the annual accredited calibration, may contact their local Keysight representative.
Keysight recommends you calibrate the OCXO annually by comparison to a known, accurate
10
MHz source (GPS or atomic clock derived). The calibration potentiometer is accessible on the rear
panel without opening the GSS6450.
For more information on Keysight’s calibration service, customers may refer to MS3089: Keysight
Support Service for Positioning Technology Products, Customers who require more information on
Altering the
10 MHz adjustment outside of a Keysight-authorized ISO/IEC17025 accredited
laboratory will invalidate the accredited calibration, if you have one. Please contact Keysight
support if you want to maintain or renew your accredited calibration.
this accreditation · Performance Specifications
Table 5 gives an example of the allowed combinations of channel, bandwidth and dynamic range
五、Throughput Limitations（表 5）
No of Channels Dynamic Range 10 30 50 60
80
条件：automatically calculates and ensures you cannot select an invalid combination.
N: configuration not allowed n/a: configuration not available
The GSS6450 can record up to four signals, two on Channel A and two on Channel B. Each
channel has a maximum throughput of 200 MBps, and there is a combined throughput limit of 300
MBps. When configuring the channels in the GSS6450, the front panel screen or the web server
On any one channel the signals must have the same bandwidth and dynamic range. However,
Channel A and Channel B can always have different dynamic ranges, and there are some
combinations of different bandwidths that are allowed. In these cases, the formula above should
be used to ensure that the required combinations can be set without breaking the throughput
limits. The throughput values are automatically calculated in the GSS6450, and the user is warned
RF1
Frequency bands GNSS RF in and out 1161-1260 MHz
1260 – 1300 MHz*
1550-1610 MHz
1521-1551 MHz*
*B3, E6 as standard, Inmarsat
GNSS, up to four frequencies
Bandwidth6 Bandwidth 3 dB points 10.23, 30.69, 51.15, 61.38
81.84
(@92.07 Msps) MHz
Anti alias rejection from adjacent signals approx.
15dB
Freq 10.23, 30.69, 51.15
61.38
RF output Additive phase noise Better than -45 dBc @ 1 kHz Integrated phase noise over
1Hz -
Frequency bands Cellular RF in and out
690 – 2400 MHz
条件：IQ calibration at specific frequencies is required for accurate operation.
Anti alias rejection from adjacent signals approx. 15dB 6 Bandwidth is defined as the 3dB point +/ - 1dB passband ripple 7 Bandwidth is defined as the 3dB point +/ - 1dB passband ripple
Bandwidth7 Bandwidth 3 dB points 10.23, 30.69, 51.15, 61.38
81.84
(@92.07 Msps) MHz
Freq 10.23, 30.69, 51.15, 61.38 MHz
81.84
RF output Additive phase noise Better than -45 dBc @ 1 kHz Integrated phase noise over
1Hz -
条件：IQ calibration at specific frequencies is required for accurate operation.
Frequency bands Wireless RF in and out
470 – 6000 MHz
Single band up to 80MHz bandwidth
Barred center frequencies
988.0 - 1006.6 MHz
1159.0 - 1168.0 MHz
1193.0 - 1199.0 MHz
1491.0 - 1500.0 MHz
1545.0 - 1558.0 MHz
1975.0 - 2014.0 MHz
These center frequencies cannot be set – either use RF2 or a center frequency outside the band
Bandwidth8 Bandwidth 3 dB points 10.23, 30.69, 51.15, 61.38
81.84
(@92.07 Msps) MHz
Anti alias rejection from adjacent signals approx.
15dB
Freq 10.23, 30.69, 51.15, 61.38 MHz
81.84
RF output Additive phase noise Better than -45 dBc @ 1 kHz Integrated phase noise over
1Hz -
Storage capacity Internal SSD 2 TB See Table
3.
Attenuator Internal stepped attenuator9
20 dB in 1 dB steps, all channels plus
20 dB in 1 dB steps, per channel
Ability to switch off a complete channel
Note: for frequencies above
2.4GHz
条件：Stored in editable log file. NMEA data from the internal GNSS receiver can be stored.
External data recording on Serial Port
4800 to 115200 baud
Eight 通道外部 data i/o 开 Aux 端口
Max recommended bit rate 300 kbps @ 10.23 MHz 900 kbps @ 30.69 MHz 1500 kbps@
51.15 MHz
Sampled at 1/8th of the main
Built-in controller and WebServer Operating System Linux Kernel
4.19
Internal Battery 90 Wh
1.5 hr. record or
playback time10
External Power
12 to 18 V DC
3.9A Rear panel
2.1mm socket
Output: 18 V DC
2.1mm DC jack
Vehicle cigarette lighter adapter supplied
条件：recording or playback 8 Bandwidth is defined as the 3dB point +/ - 1dB passband ripple 9 You can use attenuation to recreate real -world effects, such as degradation of signals when using poorly designed antenna or obscured signals. The GSS6450 provides a simple way of attenuating signals and provides for overall or
for high accuracy sensitivity testing. 10 1.5 hours when operating at ambient temperatures in the range 0 to 30°C.
For ambient temperatures between 30 and 40 °C, battery life may be reduced.
Cigarette lighter plug to locking
2.1 mm jack
Warm up period
10 minutes before
individual channel adjustment. However, the C/No ratios that an attached GNSS receiver reports may not change dB for
dB with the input attenuation because of the way the GNSS receive r calculates its C/No ratio and adjusts its AGC. In
wider bandwidth recordings it is possible that not all signals will decrease at exactly the same rate. For a given GNSS
receiver, however, the results using the in -built attenuator will be repeatable. Keysight recommends using a simulator
OCXO < +/- 1 ×10 -11 over
1 sec
AGC presents optimum levels at the ADC (analogue to digital converter)
for a Gaussian distribution over
90 dB input signal level range. Each
signal has independent AGC control up to 50 dB. There is also an
used to replay at the same power levels as recorded
Measured at L1 frequency.
Fixed Input Gain12
RF1, RF2, RF3
RF1 RF2 RF3
-80 dBm to –
30 dBm
-50 dBm to 0 dBm
-50 dBm to 0 dBm
-100 dBm to –
40 dBm
-60 dBm to –10 dBm
-60 dBm to –10 dBm
条件：Output gain can be set before or during playback. Intended for use with GNSS signals on RF1.
-120 dBm to –
55 dBm
-70 dBm to –
20 dBm
-70 dBm to –
20 dBm
Output Gain Across all channels 0 dB 10 dB
20 dB (default)
Playback Offset Can set the playback offset to 1microsecond
Master/Slave time alignment
10 MHz: Time alignment up to 100 ns.
30/ 50/ 60/
80 MHz: Typical:
以上指标摘自厂家官方数据手册，完整定义、测试条件与保证值口径以手册为准。完整指标、测试条件与定义口径请见产品页「软件和手册 | 白皮书」栏目中的官方数据手册。
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