TM 11-6625-2781-14&P-2
Section IV
PERFORMANCE TESTS (cont'd)
4-23. Input Impedance (cont'd)
ANALYZER Control Settings (cont'd)
BANDWIDTH ................................ ................................ ................................ ................................ .......... 10 kHz
SCAN WIDTH ................................ ................................ ................................ ............................. PER DIVISION
SCAN WIDTH PER DIVISION ................................ ................................ ................................ ............... 0 1 MHz
INPUT ATTENUATION................................ ................................ ................................ .............................. 30 dB
SCAN TIME PER DIVISION ................................ ................................ ................................ .. 5 MILLISECONDS
LOG/LINEAR ................................ ................................ ................................ ................................ ......... LINEAR
LINEAR SENSITIVITY................................ ................................ ................................ ......................... 2 mV/DIV
TUNING STABILIZER ................................ ................................ ................................ ................................ ... ON
VIDEO FILTER ................................ ................................ ................................ ................................ ............ OFF
SCAN MODE................................ ................................ ................................ ................................ ................. INT
SCAN TRIGGER ................................ ................................ ................................ ................................ ...... AUTO
4815A
MAGNITUDE RANGE (a) ................................ ................................ ................................ ............................. 100
RANGE MHz ................................ ................................ ................................ ................................ ........... 0 5-1 5
2.
Slowly tune impedance meter through each frequency band. Observe OHM meter for indicated impedance. For
a VSWR of less than 1.3 the meter should indicate between 38.5 and 65 ohms.
38.5
65 ohms
3.
Connect test oscillator and voltmeter as indicated in Figure 4-4.
Figure 4-4. Input Impedance Accuracy Test: 2 kHz to 500 kHz
4-7
