TM 11-6625-2781-14&P-2
Section IV
PERFORMANCE TESTS (cont'd)
4-26. Frequency Response
SPECIFICATION:
Flatness (Input attenuation ,20 dB); Log: 0.5 dB; Linear: 5.8%.
DESCRIPTION:
A flat signal source is connected to the analyzer RF INPUT. The CRT display is observed for frequency response as the
input signal is tuned. The HP Model 661B is used as a signal source between 1 kHz and 10 MHz and the HP Model
608E/F (output monitored by the HP 8405A) is used between 10 MHz and 110 MHz.
Figure 4-9. Frequency Response Test: 10 MHz to 110 MHz
EQUIPMENT:
Test Oscillator................................ ................................ ................................ ................................ ............. HP 651B
Signal Generator................................ ................................ ................................ ................................ ...... HP 608E/F
RF Voltmeter ................................ ................................ ................................ ................................ ............ HP 8405A
50-ohm Feedthrough Tee................................ ................................ ................................ ........................ HP 11536A
BNC Cable Assembly (2) ................................ ................................ ................................ ........................ HP 10503A
Type N to BNC Adapter (2) ................................ ................................ ................................ ..................... UG 201A/U
1. To check the analyzer frequency response from 10 MHz to 110 MHz, connect the test setup as shown in Figure 4-9
Make the following control settings
ANALYZER:
RANGE MHz ................................ ................................ ................................ ................................ ................... 0-110
FREQUENCY ................................ ................................ ................................ ................................ ............... 60 MHz
BANDWIDTH ................................ ................................ ................................ ................................ ............... 100 kHz
SCAN WIDTH ................................ ................................ ................................ ................................ ....PER DIVISION
SCAN WIDTH PER DIVISION ................................ ................................ ................................ ...................... 10 MHz
INPUT ATTENUATION................................ ................................ ................................ ................................ .... 30 dB
SCAN TIME PER DIVISION ................................ ................................ ................................ ........ 5 MILLISECONDS
LOG/LINEAR ................................ ................................ ................................ ................................ ................ LINEAR
4-13
