User`s guide

116 Chapter 3

S:\agilent\83217\OPT001\BOOK\CHAPTERS\passfail.fm

Pass/Fail Limit (Specification) Descriptions

8. RXA NAMPS Expandor Zero Reference Level (dBV)

8. RXA NAMPS Expandor Zero Reference

Level (dBV)

This sets the pass/fail limits that are used when the expandor’s 0 dB

reference level is measured on narrow voice channels. Lower and Upper

Limits must be entered in dBV rms.

Pass/fail limits are determined by using any applicable standard, such

as:

• MSUT Specification

RXA NAMPS Expandor Zero Reference Level is not specified in the

EIA/TIA standard for NAMPS phones. The test is performed and

pass/fail limits are available so that the operator can measure the RXA

NAMPS Expandor Zero Reference Level and compare the result to

specifications that meet his or her needs.

If the operator does not wish to compare the measurement results to

pass/fail limits, the “check” setting for pass/fail limit 15. TXA

Compressor Tracking Error >0dB (dB) can be set to “none.” See “To

Change Pass/Fail Limits” in the

Agilent 83217A Test Software User’s

Guide.

Example

If your standard states that the output voltage from the receiver should

−20 dBV rms ±1 dB for a given frequency deviation (to produce the 0

dB reference level as shown in the following figure), you would enter

−21 as the Lower Limit and −19 as the Upper Limit. (Check both limits.)