[Discuss-gnuradio] new wide-coverage receiver

[ed]

this new wide-coverage receiver might interest some on the 
list.  interesting specs.

the manufacturer is hobbyist-friendly, so it might be actually priced 
somewhere in the range of reality...

-bernieS


http://radio.tentec.com/Commercial/RX400

RX-400 PRELIMINARY SPECIFICATIONS

FREQUENCY COVERAGE: 2 - 3000 MHz. Cellular blocked within USA - unblocked 
version available to authorized users only.

MODE: USB, LSB, ISB, CW, AM, NFM, WFM

TUNING RESOLUTION: 1 Hz steps. (10 kHz steps at WB-IF output)

OPERATING TEMPERATURE RANGE :

0 - 50 degrees C @ full specification. -10 to 60 degrees C with degraded 
performance.

FREQUENCY STABILITY: standard TCXO: below 30 MHz +/-20Hz,above30 MHz +/- 3 
ppm Optional TCXO: above 30 MHz +/- 0.6 ppm

ACCURACY: All internal oscillators are locked to either internal or 
external frequency standard.

EXTERNAL FREQUENCY REFERENCE: 1, 2, 5 or 10 MHz. Receiver automatically 
switches to this reference upon application, at power up or after any 
serial link activity.

SPURIOUS RESPONSES: (design target) all spurious to be less than -105 dBm 
equivalent input max. with approx. 6 less than –80 dBm

IMAGE REJECTION: 80 dB typical 2 - 3000 MHz.

IF REJECTION: 80 dB typical 2-3000 MHz

BFO: Tunable in CW mode only, +/- 8 kHz. Tuning in 10 Hz steps. Fixed 
frequency in SSB, disabled in AM and FM.

MEMORIES: 1000

SCAN RATE: 100 channels/sec or faster

SYNTHESIZER LOCK TIME: approx. 1 ms

SQUELCH: c/n ratio 0-99 dB

SELECTIVITY: selection is mode independent. Approx. 50 filter bandwidths 
with 8-10 chosen appropriately for each of the 5 modes. Shape factor 1.5:1 
or better. (6 to 60 dB). Examples, useful for: CW – 100, 150, 200, 250, 
300, 400, 500, 600, 700, 800, 1000 Hz. SSB – 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 
2.2, 2.4, 2.6, 3.0, 3.4 kHz . AM– 4.0, 5.0, 6.0, 7.0, 8.0, 9.6, 10.4, 12.0, 
13.6, 15.2, 16 kHz.. WFM–100, 120, 140, 150, 160, 180, 200, 250, 300 kHz.

INBAND RIPPLE: 2-3 dB, referenced to IF output

SENSITIVITY:

Mode BW dBm

(for 12 dB NF)

SSB 10 db S/N 3 kHz -11

AM (50% mod) “ 6.0 kHz -10

FM-N @ 6 kHz dev 16 dB SINAD 15 kHz -107

FM-W @ 10-20 kHz dev “ 30–50 kHz -102

FM-W @ 75kHz dev “ 200 kHz -9

DYNAMIC RANGE: 3rd Order Intercept (dBm) typical 0, minimum -5. Noise 
figure (dB) typical 10, minimum 12.

2nd ORDER INTERCEPT: 50 dBm minimum

AGC: Fast, Medium, Slow, Programmable. Manual gain setting is provided in 
all four modes, adjustable over 120 dB range. DUMP feature provided in all 
modes.

Mode Attack(dB/ms) Hang(sec) Decay(dB/sec)

Fast 0.8 0 1200

Medium 0.8 0 100

Slow 0.8 0 25

Prog. 0.01-1.0 0.01-99.9 0.01-99.9

WIDEBAND IF OUTPUT, ANALOG: 21.4 MHz center frequency, fixed gain, 6 MHz 
bandwidth capable, 10 kHz tuning steps. 2 MHz bandwidth if receiver tuned 
below 20 MHz.

S-METER: reports signal level in dBm to host upon request

OPTIONS: (only one may be installed) NARROWBAND IF OUTPUT: 21.4 MHz center 
frequency, bandwidth determined by filter selection, delayed AGC. DIGITAL 
DATA OUTPUT: 16 bit, I&Q, serial. Baseband representation of NB-IF output.

CONTROL INTERFACE: built-in MULTI-DROP RS-232 (DB9 connector) and TCP/IP 
Optional: POTS – allows customer to remote unit anywhere with access to 
nothing but a phone line. No PC required.

FIRMWARE: can be updated remotely in Flash ROM

ANTENNA INPUT: 50 ohm, unbalanced, SMA connector. 2.5:1 VSWR max @ 
receiver's tuned frequency.

RF INPUT PROTECTION: accepts +20 dBm w/o damage

AUDIO LINE OUTPUT: 0 dBm (+/- 3 dBm) 600 ohm outputs. Terminals may be 
grounded or shorted together without damage. One AC coupled, one DC coupled

HEADPHONE OUTPUT: both 1/4" and 1/8” stereo phone jacks. 10 mw maximum into 
600 ohms. Front panel volume control.

POWER REQUIREMENTS: 90-264 VAC, 48-440 Hz @ approx. 40 watts. Removable six 
foot line cord included. Optional: substitute 11-28 VDC supply at 
additional cost.

DIMENSIONS: 7.5”W x 15.5”D x 3.5”H. Rack mountable with optional bracket 
kits for either half rack or full rack widths.

MTTR: less than 30 minutes for replacement of any of 8 major subassemblies.

ADDITIONAL FEATURES: MUTE,for use in transmit/receive applications, mutes 
audio and IF outputs.