Digital Base Control Card (CI-BC-4E-00)

The P25 base control card is used with the P25 base receiver and transmitter in a MT-4 base station and provides audio routing, COR and PTT routing and front panel control. It can drive an external speaker directly and can select up to 32 programmed channels in each radio module. Selection of encrypted or clear transmission is made from the front panel. As well, a pushbutton is mounted to erase all encryption keys in both radio modules. Separate volume controls are provided for speaker and handset volume. The base control card includes the following features: Jumper selectable audio routing, PTT, and muting. Low power analog and CMOS control circuitry. True balanced 600 Ω inputs and outputs for external equipment connection. Optically isolated inputs and outputs for control by external equipment. Front panel control of channel and bank select for receiver and transmitter. Front panel selection of clear / secure (encrypted) operation and clear keys operation Front panel selection of local or remote control of base station functions.

Please see the PDF technical note to view more information about the Digital Base Control Card (CI-BC-4E-00).

Digital Repeater Card (CI-RC-4L-00)

The P25 repeater control module is used with a P25 receiver and transmitter system. The repeater control card allows P25 digital or analog signals to pass transparently from the receivers to the transmitters in repeater, crossband, or linked repeater systems. The P25 repeater control module provides serial data routing, COR-PTT routing, and receiver priority settings for an MT-4 radio system. The repeater control card includes the following features: Jumper selectable serial data and COR-PTT routing (repeater configuration). Receiver priority setting jumpers for certain configurations (where required). Jumpers for disabling serial data and COR-PTT routing on simplex links. Optional CTCSS interface board for 1 of 10 CTCSS tone decode selection (used for custom systems only).

Please see the PDF technical note to view more information about the Digital Repeater Card (CI-RC-4L-00).

The AC-3E Audio Control Card has cross linking audio, audio switching, custom tone signaling and adjustable hang-timers. The E Version has the above features and includes an E & M interface providing 600 Ω RX and TX audio paths with buffered / independent level controls, opto - coupler isolated COR and opto - coupler switched PTT controls. This card allows a remote to seize control of the radio system. The AC-3E audio control card includes four potentiometers on the front panel for adjusting internal audio levels. Optional CTCSS and frequency select rotary switches can also be mounted on the front panel of the audio control cards, giving easy access to 10 pre-programmed CTCSS tones and 16 pre-programmed receiver and transmitter operating frequencies. Two switches are mounted on the front of the audio control card that can be configured to control CTCSS on / off or repeat disable. Configuration of all switches on the audio control card is set up at the factory at the time of order.

Please see the PDF technical note to view more information about the Analog Base / Cross Repeater Control Card (AC-3E).

Paging Interface Card (CI-PM-3)

The CI-PM-3 Paging Interface card supports encoder interfaces for analog and digital paging formats. Both analog and digital paging formats are supported and it can transmit POCSAG, Flex™, Golay, and other 2-level modulation schemes at data transfer rates of 512, 1200, and 2400 Baud. It can also be configured as a data repeater, whereby 2-level paging data is recovered, reshaped and retransmitted to an additional repeater/paging transmitter. It supports 4-level modulation formats in non-repeater mode only at data transfer rates up to 3200 bps. Each of the four modulation deviation levels can be independently set. The CI-PM-3 Paging Modulator also includes an on-board 0.1-0.35 ppm 10-MHz OCXO and an external connection for higher OCXO stability if a Simulcast system is required. An internal CTCSS encoder/decoder is optional.

Control Options

Audio control options give the operator a number of ways to control the radio. Daniels currently manufactures: CTSS encoder/decoders, DTMF decoders, two-tone sequential decoders, sequential encoders, burst tone decoders, digitally controlled squelch encoder/decoders, CTCSS rotary encoder/decoders, and two 16 channel rotary frequency switches. The audio control options operate from -40° C to + 60° C, are mounted internally on Daniels AC-3x series of control cards and can be configured for wide ranging radio control functions.

CTCSS Encoder - Operates between 67 and 255 Hz (±.01Hz). The tone output is a low distortion sine wave with a variable setting from 0 - 2 Vdc. The encoder draws approximately 5 mA.

CTCSS Decoder/Encoder - Operates between 67 and 255 Hz (±.01Hz). The tone output is a low distortion sine wave with a variable setting from 0 - 2 Vdc. The decoder / encoder draws approximately 14 mA. The tone is selected on a BCD DIP switch. The encode and decode tones are not selected separately. A separate encoder must be purchased to use different tones.

DTMF Decoder - The subminiature DTMF decoder will respond to an address of 2 to 4 digits in length using any of the 16 DTMF characters. The decoder incorporates Group, All Call and Remote Reset features. The DTMF decoder draws 12 mA.

Two-Tone Sequential Decoder - controls repeater operations by selecting latched outputs in response to group call formats of F1 or F2. The decoder is continuously tunable on any tone frequency over a specified range. This decoder is compatible with a wide range of special tone formats. The decoder draws 8 mA.

Sequential Tone Encoder - generates selectable tones for tone protected base stations. The encoder is continuously tunable on frequencies over a specified range (300 Hz to 3kHz). This encoder is compatible with a wide range of special tone formats and is capable of sending F1 and F2 formats. The encoder draws 8 mA.

Burst Tone Decoder - controls repeater operations by selecting latched outputs in response to "Burst Tones" or "Single Tone" formats. The decoder is continuously tunable on any tone frequency over a specified range. This decoder is compatible with a wide range of special tone formats. The decoder draws 8 mA.

Digitally Coded Squelch - Encoder / Decoder - controls repeater operations by selecting latched outputs in response to 23 bit DCS code words. PCB jumpering allows easy programming for the DCS code, RX / TX polarity, and Mute functions. Squelch tail elimination is controlled by an end of transmission turn off code. The decoder draws 10 mA.

CTCSS Rotary Switch - Decode Tone - This switch option for the AC-3x series of cards allows the user to select up to 10 front panel controlled decode tones. All standard CTCSS tones may be selected internally, however only 10 may be controlled via the rotary switch.

CTCSS Rotary Switch - Decode / Encode Tone - This switch option for the AC-3x series of cards allows the user to select up to 10 front panel controlled decode tones. All standard CTCSS tones may be selected internally, however only 10 may be controlled via the rotary switch.

16 Channel Frequency Select Rotary Switch - This option for the AC-3x series of cards allows the user to select up to 16 front panel controlled receiver and transmitter frequencies pairs. This option may alternately be configured to control just one RF module.

16 Channel Frequency Select Rotary Switches - This option for the AC-3x series of cards allows the user to select up to 16 front panel controlled receiver and transmitter frequencies independently via two rotary switches.