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S:\Hp8960\E1962B CDMA 2000\Pi Release\Reference Guide\Chapters\cdma2000_gen_bse_avctest.fm
AVC Test Operating Mode
AVC Test Operating Mode
Analog Voice Channel (AVC) test mode provides a forward voice channel for operating AMPS mobiles in test
mode. This allows you to get the mobile transmitting on an AVC and test many functions in the mobile without
the need to register or page the mobile.
AVC Test Mode Operation
When the test set’s operating mode is AVC test mode:
• No over the air signaling is available.
• Changes to the test set’s AVC channel assignment occur immediately.
• When the test set’s AVC channel is changed, the base station emulator is automatically reconfigured to
receive the corresponding reverse AVC signal from the mobile. If needed, you can disable this operation by
selecting manual receiver frequency control. See “Receiver Control” on page 194.
• Changes to the MS TX Level automatically set the expected analog input power. If needed, you can disable
this operation by selecting manual receiver power control. See “Receiver Control” on page 194.
• SAT modulation of the test set’s forward AVC can be turned on or off, and can be set to any of the three color
code frequencies.
• Internal FM of the forward AVC is available for various audio frequency tests.
• An external FM source can be used to provide addition frequency modulation of the forward AVC.
Forward Channel FM Operation
Frequency modulation of the forward channel in AVC test mode is a combination of the SAT, internal FM, and
external FM settings. No wideband data is present.
To meet specifications, the total peak FM deviation cannot exceed 20 kHz. Limitations for each FM source are
as follows:
• SAT - can be turned on or off, and has three color code selections: SAT1 (5970 Hz), SAT2 (6000 Hz), SAT3
(6030 Hz). Peak deviation is fixed at 2 kHz.
• Internal FM - can be turned on or off, has a rate range of 100 Hz to 20 kHz, and a peak deviation range of
0 Hz to 20 kHz.
• External FM - uses the test set’s rear-panel FM Mod In port to connect an external modulation source. The
fixed peak deviation for a 100 Hz to 20 kHz tone is 20 kHz/Volt.
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