PTX-3

Technical Specifications

Operating frequencies (MHz): Channel spacing:  100 kHz (0.1 MHz)

Spurious & Harmonic Suppression: 37 dBc above 1 GHz

Frequency Stability: ±.001% (10 ppm) @ 25ºC

Temperature Stability: ±.001% (10 ppm) from -30º C to +50º C

Channel Selection: Momentary pushbutton switches, TUNE UP and Down

Compatibility Modes: IFB, Digital Hybrid Wireless; 400 Mode, 200 Mode, 100 Mode, Mode 3, Mode 6

Pilot Tone: 29.997 kHz IFB Mode, 32.765kHz; 200 Mode, 400 Mode step selected, 32.768kHz Mode 6

Modulation: FM, ±20 kHz deviation IFB & 100 Mode, ±75kHz 200 & 400 Mode, ±50kHz Mode 3 and Mode 6

Audio Frequency Response: 100 Hz to 8 kHz, ±1 dB, IFB MODE system response (see Rolloff), 30Hz to 20kHz ± 1dB, 200 & 400 MODE system response (see Rolloff)

Rolloff: Low frequency audio rolloff is Menu selectable for 3 dB down at 35 Hz or 50 Hz

Signal to Noise Ratio: 90 dB typical (“A” weighted)

RF Power Output: 250 mW (nominal)

Output Impedance: 50 Ohms

Audio Input Levels: 0 dBu for Line, RTS1 & RTS2, -10 dBu for ClearCom, and -42 dBu mic dry inputs, +/-50VDC max

Audio Input Config: Balanced and Unbalanced, rear panel selectable for Line, Mic, RTS 1, RTS 2 and ClearCom

Audio Input Impedance: Greater than 2 K balanced, greater than 1K unbalanced at any gain setting

Control Range: -18 dB to +24 dB (0 dB nominal center), software selectable

Audio Input Jack:  Standard XLR female connector

Input Power:  12 to 14 VDC typical, 200 mA max; Max input range 6 to 18 VDC

Power Input Jack: Coax type, locking LZR RL26AE

Indicators: Backlit Liquid Crystal Display. Displays modulation meter, frequencies, modes, rolloff, audio level, and tuning groups

Front Panel Controls:
Rear Panel Controls: Input Mode Select, 4 section DIP switch

Weight: 9oz

Size: 5.25” long (including connectors) x 3.25” wide x 1.25” high

Emission designator: 180KF3E

The T4 IFB transmitter is FCC type accepted under Part 74:470 -
608MHz and 944.1 - 951.9 MHz

The FCC requires that the following statement be included in this
manual:

This device complies with FCC radiation exposure limits as set forth for
an uncontrolled environment. This device should be installed and
operated so that its antenna(s) are not co-located or operating in
conjunction with any other antenna or transmitter. A separation
distance of at least 20cm (8 inches) must be maintained to comply with
the FCC Radio Frequency Maximum Permissible Exposure (MPE)
requirements.

Product Spares List

Spares Part	Part Description
PRK-2	1RU Rack mount kit for the PTX-6 transmitter.  Up to 4 transmitters can be rack mounted using the kit.
TP12E	110/220V universal power supply for PTX-3 wireless IFB transmitter.