4-4 Transceiver Performa nce Testing
Figure 4-3: Two-Line Display
Figure 4-4: Four-Line Display (HT1550XLS)
Table 4-1: Test Environments (Side Button 1)

Number of

Side

Button 1

Presses

No. of

Beeps Display

Shows Description Function

Initial (No but-
ton presses
required)
0CSQ Carrier
Squelch
RX: if carrier detected
TX: mic audio
1 1 TPL Tone Private-
Line
RX: unsquelch if carrier and tone
(192.8Hz) detected
TX: mic audio + tone (192.8Hz)
2 2 DPL Digital Private-
Line
RX: unsquelch if carrier and digi-
tal code (131) detected
TX: mic audio + digital code (131)
3 3 DTMF Dual-Tone
Multiple
Frequency
RX: unsquelch if carrier detected
TX: selected DTMF tone pair
4 5 Open Unsquelch RX: constant unsquelch
TX: mic audio
5 9 HSS MDC1200 RX: unsquelch if carrier detected
TX: 1500Hz tone
611 CMP Compander RX: if carrier detected
TX: mic audio
7 12 LLE Low-Level
Expand
RX: if detected
TX: mic audio
Annunciators
Test Mode
Information,
Line 2
Annunciators