Technical data

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Chapter 4, Test, Parameter, and Pass/Fail Limit Descriptions

Pass/Fail Limit 10, RX CTCSS SINAD at Opening

“CTCSS SINAD at opening” refers to the SINAD measured at the opening level

of the squelch tone.

This is used with

Pass/Fail Limit 9, RX CT/CDCSS Opening Level to set the pass/

fail limits for testing a receiver’s CTCSS opening.

Pass/Fail limits are determined from an applicable radio specification or industry

standard, such as:

• Radio specification: Threshold Squelch Sensitivity

• Industry standard: EIA/TIA-603, Section 2.4.1, Squelch Opening SINAD

For Example:

If your industry standard defines the tone-squelch opening SINAD as less than 8

dB and you want to test the radio’s upper limits only, enter

0 in the lower-limit

column and

8 in the upper-limit column. Limits are entered in dB.

It’s Used in the Following Test:

TEST_17. RX CTCSS/CDCSS Opening