Motorola MTR3000 Basic Service Manual

MTR3000 Radio Frequency Distribution System (RFDS) Equipment: Field Tuning Procedures 9-33
Figure 9-25 UHF Duplexer Field Tuning Procedure (continued)
Boonton 92E RF
Millivoltmeter
Range set to +10 dBm
6.Verifying Insertion Loss
1. Connect test equipment as shown.
2. Observe and note the level in dBm
as shown on the millivoltmeter.
3. Connect the duplexer cables and
test equipment to the duplexer as
shown.
4. Observe and note the level in dBm
as shown on the millivoltmeter.
5. Subtract the absolute number
noted in Step 2 from the number noted
in Step 4. The difference should be
less than 1.3 dB to meet specification
for Insertion Loss.
6. Repeat Steps 1–5 for Low- Pass/
High Notch cavities with the following
exceptions:
a. Set Frequency Generator for
Rx or Tx frequency, whichever is
LOWER
b. Connect Signal Generator to
Low Pass duplexer input (cavity
no.1)
c. Connect terminator to cavity
no.6.
Frequency set to Rx or Tx frequency,
whichever is HIGHER.
Output Level set to +10 dBm.
Boonton 92E RF
Millivoltmeter
HP8656B Signal Generator
HP8656B Signal Generator
6 dB In-line pad
(50 Ω)
UG349A
N-to-BNC
Connector
50 Ω Terminator
6 dB In-line
pad (50 Ω)
1 6

Motorola MTR3000 Specifications

General

Brand	Motorola
Model	MTR3000
Category	Accessories
Language	English