Uniden BCD436HP User Manual

97
Continuous Tone Coded Squelch System (CTCSS) and Digital Coded Squelch
(DCS) are two methods used to prevent interference by other radio
communications. Your scanner can receive transmissions that use these codes.
CTCSS and DCS systems all use some form of coded squelch. Coded squelch
involves the transmission of a special code signal along with the audio of a radio
transmission. A receiver with coded squelch only activates when the received
signal has the correct code. This lets many users share a single frequency, and
decreases interference caused by distant transmitters on the same channel. In all
major metropolitan areas of the United States, every available radio channel is
assigned to more than one user.
CTCSS Frequencies
The scanner can detect the following 50 CTCSS frequencies.
67.0Hz
94.8Hz
131.8Hz
171.3Hz
203.5Hz
69.3Hz
97.4Hz
136.5Hz
173.8Hz
206.5Hz
71.9Hz
100.0Hz
141.3Hz
177.3Hz
210.7Hz
74.4Hz
103.5Hz
146.2Hz
179.9Hz
218.1Hz
77.0Hz
107.2Hz
151.4Hz
183.5Hz
225.7Hz
79.7Hz
110.9Hz
156.7Hz
186.2Hz
229.1Hz
82.5Hz
114.8Hz
159.8Hz
189.9Hz
233.6Hz
85.4Hz
118.8Hz
162.2Hz
192.8Hz
241.8Hz
88.5Hz
123.0Hz
165.5Hz
196.6Hz
250.3Hz
91.5Hz
127.3Hz
167.9Hz
199.5Hz
254.1Hz
DCS Codes
The scanner can detect the following 104 hexadecimal DCS codes.
006
031
054
116
145
205
245
266
332
411
452
506
612
703
007
032
065
122
152
212
246
271
343
412
454
516
624
712
015
036
071
125
155
214
251
274
346
413
455
523
627
723
017
043
072
131
156
223
252
306
351
423
462
526
631
731
021
047
073
132
162
225
255
311
356
431
464
532
632
732
023
050
074
134
165
226
261
315
364
432
465
546
654
734
025
051
114
141
172
243
263
325
365
445
466
565
662
743
026
053
115
143
174
244
265
331
371
446
503
606
664
754

Uniden BCD436HP Specifications

General

Model	BCD436HP
Antenna	Removable SMA Antenna
Close Call RF Capture	Yes
Dynamic Memory	Yes
PC Programmable	Yes
Water Resistance	No
Category	Scanner Radio
Display	Dot-matrix LCD
Power Source	3x AA batteries or USB power
Weight	10.1 oz
Type	Handheld
GPS	Optional GPS receiver supported
Audio Output	Earphone jack (3.5 mm)
Trunking Systems Supported	Motorola, EDACS, LTR, APCO 25 Phase I and Phase II
Modulation Types	AM, FM, NFM, P25
Battery Life	Varies with usage
Display Type	LCD
USB Port	Yes
SD Card Slot	Yes
Frequency Range	25-512 MHz, 758-960 MHz, 1240-1300 MHz