TM 11-6625-2781-14&P-2
ERRATA
PERFORMANCE TESTS (cont'd)
4-29. Residual Responses
SPECIFICATION:
Referred to signal level at input mixer*:
200 kHz to 110 MHz: <- 100dBm
20 kHz to 200 kHz: <-95 dBm.
DESCRIPTION:
Signals present on the display with no input are called residual responses. To measure residual responses, a reference
is selected so that -110 dBm is easily determined. The display is searched for residual responses under the various test
conditions called out.
1. Set the analyzer controls as follows:
RANGE MHz ................................ ................................ ................................ ................................ ................... 0-110
FREQUENCY ................................ ................................ ................................ ................................ ............... 85 MHz
FINE TUNE................................ ................................ ................................ ................................ ................. Centered
BANDWIDTH ................................ ................................ ................................ ................................ ................... 1 kHz
INPUT ATTENUATION................................ ................................ ................................ ................................ ...... 0 dB
SCAN WIDTH ................................ ................................ ................................ ................................ ....PER DIVISION
SCAN WIDTH PER DIVISION ................................ ................................ ................................ ........................ 5 MHz
BASE LINE CLIPPER ................................ ................................ ................................ ................................ ..max ccw
SCAN TIME PER DIVISION ................................ ................................ ................................ ............... 10 SECONDS
LOG/LINEAR ................................ ................................ ................................ ................................ ..................... LOG
LOG REF LEVEL controls................................ ................................ ................................ ............................ -60 dBm
TUNING STABILIZER................................ ................................ ................................ ................................ ...........On
VIDEO FILTER ................................ ................................ ................................ ................................ .................. OFF
SCAN MODE ................................ ................................ ................................ ................................ ....................... INT
SCAN TRIGGER ................................ ................................ ................................ ................................ ............ AUTO
*Signal level at input mixer - Signal level at RF INPUT - INPUT ATTENUATION.
B-19
