4.2.5
Frequency Range, Resolution and Accuracy
Specification
Range:
From .01, .5, or 2 GHz to 20 or 26.5 GHz
Resolution:
1 kHz (1 Hz with Option 16)
Accuracy:
Same as time base accuracy
Description
The output of the UUT is connected to the input of a frequency counter. The internal time base
of the counter is a reference for the UUT to eliminate time base errors from the measurements.
This procedure does not check for time base accuracy, and therefore the UUT frequency display
should agree with the counter, within each instrument’s resolution. Note that there are possible
faults in the UUT which, although the lock indicators show normal operation, will cause
frequency errors. For this reason a number of specific frequencies are tested. Test frequencies
have been selected so that any defective circuits will be easily isolated.
Procedure
1.
Connect the equipment as shown in Figure 4-1. Connect the UUT RF Output to the
10 MHz to 500 MHz counter input using the coaxial cable and the SMA to BNC
adapter. Allow the equipment at least 30 minutes of warm-up. Since the UUT and the
counter use the same time base, time base errors are eliminated. The UUT will
automatically switch to the external reference when it is connected.
2.
Press [SHIFT] [RESET] on the UUT, then set the UUT to its minimum frequency. Press
[LEVEL] and enter [-] [1] [0] [dBm]. The counter should read the frequency set + the
counter resolution.
3.
Connect the UUT RF out to the counter 500 MHz-40 GHz input. Press [SHIFT]
[RESET] on the UUT, then enter the maximum frequency of the UUT. The counter
should read the entered fre1 Hz, + the counter resolution.
4.
To check that the Divide-by-N circuit is functioning properly, refer to the Test Data
Sheet and program each of the listed frequencies into the UUT by entering (for
example) [CW] [2] [0] [0] [1] [MHz]. For each listed frequency the counter should read
the entered fre 1 Hz + the counter resolution. The frequencies listed are
arranged in a binary sequence since the Divide-by-N circuit works in that manner. By
setting the frequencies listed, each data bit supplied to the divider is individually tested.
Equipment Required
Frequency counter
Coaxial cable
SMA to BNC adapter
Figure 4-1. Frequency Range, Resolution, Accuracy
Model GT 9000 Microwave Synthesizer
4-12
Manual No. 120AM00250, Rev C, September 1998
Summary of Contents for GT 9000
Page 12: ...Series GT 9000 Microwave Synthesizers x Manual No 120AM00250 Rev C September 1998 ...
Page 14: ...Series GT 9000 Microwave Synthesizers xii Manual No 120AM00250 Rev C September 1998 ...
Page 18: ...Series GT 9000 Microwave Synthesizers xvi Manual No 120AM00250 Rev C September 1998 ...
Page 20: ...Series GT 9000 Microwave Synthesizers xviii Manual No 120AM00250 Rev C September 1998 ...
Page 94: ...Model GT 9000 Microwave Synthesizer 3 36 Manual No 120AM00250 Rev C September 1998 ...
Page 122: ...Model GT 9000 Microwave Synthesizer 4 28 Manual No 120AM00250 Rev C September 1998 ...
Page 142: ...Model GT 9000 Microwave Synthesizer 5 16 Manual No 120AM00250 Rev C September 1998 ...
Page 198: ...Model GT 9000 Microwave Synthesizer 6 56 Manual No 120AM00250 Rev C September 1998 ...
Page 206: ...Model GT 9000 Microwave Synthesizers 7 2 Manual No 120AM00250 Rev C September 1998 ...
Page 232: ...Model GT 9000 Microwave Synthesizer A 26 Manual No 120AM00250 Rev C September 1998 ...
Page 238: ...Model GT 9000 Microwave Synthesizer Index 6 Manual No 120AM00250 Rev C September 1998 ...
