4/18/11 888-2587-001 6-9
WARNING: Disconnect primary power prior to servicing.
Section 6 Troubleshooting
FM HD Radio System
Figure 6-2 VT100 - Page 2
CONFIGURE & SETTINGS:
(1) Modulation: (FM/FM-HD/HD) This will change the bias mode of the PA module.
(2) Operation Mode: (BOOST AMP/STAND ALONE TX) The difference between
the boost amp and the stand alone are limits on power and reflected power.
(3) TX Type: (MINI-HD/QUEST/Z_4_6_8_HD/Z_12_16_HD/Z_HD_DUAL/
Z_2_CD/ Z_3_5_CD/Z_7_10_CD/Z_CD_DUAL/LP_HT/MP_HT/HT_20_25/
HT_30_35_B/ HT_30_35_A/HTD_60_70/PT_2_4_5/PT_8_10/CUSTOMIZED).
When Operation Mode is set to STAND ALONE TX, the TX Type automati-
cally changes to STAND ALONE TX. This is the only condition where the TX
Type: STAND ALONE TX is available.
(4) Mute Polarity: (ACTIVE LOW/ACTIVE HIGH/DISABLED)
(5) Fast Mute Polarity: (ACTIVE LOW/ACTIVE HIGH/DISABLED)
(6) Power Mode: (EXT ACP/INT APC/MGC)
(7) APC Reference: (0-4095) Internal reference for forward power.
(8) Phase: (0-4095) Adjusts the phase of the RF output approximately 0° to -90°.
(9) APC Scale Factor: (0-4095) A multiplier to scale the external APC voltage.
(a) Fwd Pwr Trip: (0-4095) Sets the trip point for a comparator.
(b) Rfld Pwr Foldback: (0-4095) Sets the trip point for a comparator.
(c) Rfld Pwr Trip: (0-4095) Sets the trip point for a comparator.
(f) Fault Reset: Typing f will reset the Fault Strike Status.
(r) RF Mute/Unmute: Typing r will mute (or unmute) the RF depending on the current
state.
(CTRL-z) Lock/Unlock: This will allow the user to unlock the current configuration
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