15
25A1104 (Rev.1)
SERVICE PROCEDURES
MEASUREMENT REFERENCE
NOTE: Audio levels in dBu are marked as dBm on the HP8903.
REQUIRED TEST EQUIPMENT (OR APPROVED EQUIVALENT OR SUPERIOR MODELS):
dB Conversion Chart
0dBV = 2.2 dBu
0dBu = 0dBm assuming the load = 600 ohms
Be aware that dBu is a measure of voltage and dBm
is a measure of power. The HP8903, for example,
should be labeled dBu instead of dBm since it is a
voltage measurement. These two terms are often
used interchangeably even though they have
different meanings.
RF Generator Agilent E4400B
Digital multi-meter Fluke 87
Audio Analyzer HP 8903B
1 GHz Frequency Counter HP 53181A
Spectrum Analyzer HP 8591A
Power Supply PS20
Shielded Test Lead Shure PT1838F
BNC (M) to BNC (M) cable (2) Shure PT1838A
BNC (F) to ¼"
adapter Shure PT1838C
BNC (M) to unterminated Shure PT1824
Matching PG1/PG2 Transmitter PG1/PG2
XLR (F) to Banana Plug Adapter Shure PT1841
Toray non-inductive tuning tool - White Shure PT1838M
Toray non-inductive tuning tool - Blue Shure PT1838K
Toray non-inductive tuning tool - Pink Shure PT1838L
Non-inductive hex tuning tool Shure PT1838N
Jumper wires
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