·         Portable recivers All the same size

·         T1 is bigger then t4 radio Ifb

·         R1b smaller then r1a

·         Frequency Adjustment Range: 25.5 MHz in 100 kHz steps

·         Receiver Type: Triple conversion; superhet

·         IF frequencies: 244 MHz, 10.7 MHz and 300 kHz

·         Frequency Stability: ±0.001 %

·         Front end bandwidth: ±5.5 MHz, @ -3 dB

·         Sensitivity:

20 dB Sinad: 0.9 uV (-108 dBm), A weighted

60 dB Quieting: 1.12 uV (-105 dBm), A weighted

·         AM rejection: >60 dB, 2 uV to 1 Volt

·         Modulation acceptance: 85 kHz

·         Image and spurious rejection: 85 dB

·         Third order intercept: +8 dBm

·         Diversity method: Phased antenna SmartDiversityTM

·         FM Detector: Digital pulse counting detector operating at 300 kHz

·         Antenna inputs: Dual BNC female jacks; 50 Ohm impedance

·         Audio output: Rear panel XLR connector; can drive 600 Ohm,

·         adjustable from -50 to +5 dBu in 1 dB steps

·         (into nominal 10 k bal. load)

·         Audio Performance (overall system):

·         (These audio performance specs apply only to 400 Series compatibility mode.)

·         Frequency Response: 32 Hz to 20 kHz (+/-1 dB)

·         THD: 0.2% (typical)

·         SNR at receiver output (dB):

The rear panel rotates for access to the battery compartment. Specifications Note: The dual envelope “soft” limiter provides exceptionally good handling of transients using variable attack and release time constants. Once activated, the limiter compresses 30+ dB of transmitter input range into 4.5 dB of receiver output range, thus reducing the measured figure for SNR without limiting by 4.5 dB

SmartNR No Limiting w/Limiting

OFF           103.5                108.0

NORMAL  107.0                111.5

FULL          108.5                113.0

·         Input Dynamic Range: 125 dB (with full Tx limiting)

·         Overall Latency (time delay): 3mS

·         Audio Test Tone: 1 KHz, -50 to +5 dBu, <1%THD

·         Front Panel Controls and

Indicators:

LCD display

Menu - up/down buttons

Power switch

·         Rear Panel Features:     

XLR audio output jack

External DC input

Battery compartment

·         External Power: Minumum 10 Volts to maximum 18 VDC

·         1.6 W; 170 mA at 12 VDC

·         Battery Life: 6 to 8 hrs. continuous, w/ two alkaline 9 V batteries;

·         up to 20 hrs. continuous w/ two lithium 9 V batteries

·         Weight: 15.2 ozs. (with two alkaline 9V batteries)

·         Dimensions: 3.23” wide x 1.23” high x 4.75” deep