TM 11-6625-2781-14&P-2
ERRATA
PERFORMANCE TESTS (cont'd)
4-29. Residual Responses (Cont'd)
2. Terminate the RF INPUT jack in 50 ohms.
3. Observe the display as the analyzer scans from
60 to 110 MHz. The average noise level should
be less than -110 dBm and no residual
responses should occur. Figure 4-13 represents
a scan with no residual response, and with the
average noise level indicated.
Residual Responses 60-110 MHz:
<-110 dBm
4. Set FREQUENCY to 35 MHz and observe the
display as the analyzer scans from 10 to 60
MHz. The average noise level should be less
than -110 dBm and no residual responses
occur.
Residual Responses 10-60 MHz:
Figure 4-13. Residual Response Test
<-110 dBm
5. To check the analyzer from I MHz to l 0 MHz, make the following control settings:
FREQUENCY ................................ ................................ ................................ ................................ ................. 5 MHz
SCAN WIDTH PER DIVISION ................................ ................................ ................................ ........................... I MF
SCAN TIME PER DIVISION ................................ ................................ ................................ ................... 2 SECOND
6. Observe the display for residual responses:
Residual Responses I - 10 MHz:
<-110 dBm
7. To check the analyzer from 200 kHz to 1 MHz, make the following control settings:
FREQUENCY ................................ .............................. Local Oscillator signal appears at left hand edge of graticule
SCAN WIDTH PER DIVISION ................................ ................................ ................................ .................... 0.1 MHz
BANDWIDTH ................................ ................................ ................................ ................................ ............... 0.3 kHz
SCAN TIME PER DIVISION ................................ ................................ ................................ ................ 5 SECONDS
8. Observe the display for residual responses over the last 8 horizontal divisions:
Residual Responses 20-200 MHz:
<-110 dBm
9. To check the analyzer from 20 to 200 kHz, make the following control settings:
RANGE - MHz ................................ ................................ ................................ ................................ ........... 0-11 MHz
FREQUENCY ................................ ................................ ....... Local Oscillator signal appears at left hand of graticule
SCAN WIDTH PER DIVISION ................................ ................................ ................................ ....................... 20 kHz
BANDWIDTH ................................ ................................ ................................ ................................ ................ 0.1 kHz
SCAN TIME PER DIVISION ................................ ................................ ................................ ................... 5 SECOND'
LOG REF LEVEL ................................ ................................ ................................ ................................ ............ -50 dB
10. Observe the display for residual responses over the last nine horizontal divisions:
Residual Responses 20-200 MHz:
<-95 dBm
B-20
