3-82
Performance Tests
External MTS Clock (Options US1, [US5], A1T, [A1U], A3R [A3S], 120)
External MTS Clock (Options US1, [US5], A1T, [A1U],
A3R [A3S], 120)
Specifications
Description
This test verifies that signal integrity is maintained when the EXT MTS clock is
used as a reference.
Equipment Required
Procedure
External MTS - 2MHz Clock
1. Connect the STM-1 OUT port to the
STM-1 IN port and Recall HP 37717C
DEFAULT SETTINGS as shown on 3-2.
2. Press and set up the
display as shown opposite.
3. Connect the HP 3335A to the HP
37717C Unbalanced 75Ω 2M REF IN port
(EXT MTS clock).
4. Set the HP 3335A to 2.048 MHz at
2.0V p-p.
Accepts Timing Reference as per ITU G.811
Synthesizer : HP 3335A option 001 (75Ω)
2 Mb/s PDH Test Set : HP 37717A/B option UKK or UKJ or
: HP 37714A option UKK or UKJ or
: HP 37721A
75Ω/120Ω Converter : HP 15508B
TRANSMIT
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