commtech wireless 7900 - Technical Specifications; Electrical Specifications; Technical Specification Details; Mechanical Specifications

7900 Pager Manual
Page 16 © CommtechWireless
4. SPECIFICATIONS
Note: Specifications subject to change without any notice
4.1 Electrical Specification
Rx Frequency (MHz) ...................................... 135-175, 276-284, 406-414, 429-437, 439-470, 929-932
Nominal Battery Life .................................................................... around 60 days (‘AA’ alkaline battery)
Operating Voltage ....................................................................................................................... 1.5 volts
Power Supply .................................................................................................................... 1 x AA battery
Current Consumption ................................ RF <8mA, Standby <1mA, Vibrate <100mA, Buzzer <80mA
Low Voltage Detection .............................................................................. RF cut @ 1.1volts ± 0.05volts
Logic Off Voltage ......................................................................................................................... 0.8volts
Backlight ........................................................................................................................... 3 x White LED
Keys ............................................................................. 4 Keys (Enter, Escape, Left Arrow, Right Arrow)
4.2 Technical Specification
Code Format ............................................................................................................................. POCSAG
Programming ........................................................................................ Programming lead and software
Cap codes ............................................................................................................. 6, frame independent
Message Capacity ............................................................. 60 messages (500 characters per message)
Memory backup .................................................................................................... more than 20 minutes
LCD ..................................................................................................... 6 x 8 dot matrix, total of 36 chars
Icons ............................................................................................................................... 9 function icons
Vibrator .......................................................................................................... Low noise core less motor
Buzzer ..................................................................................................................... 80dBc SPL @ 30cm
Alert Types ............................................................................................... Beep, Vibrate, Beep& Vibrate
Approvals .................................................................................................. CE / FCC / ACA C-tick / DOC
4.3 Mechanical Specification
Unit size ................................................................................................ 70 x 49 x 19 mm without holster
...................................................................................................... 2.7 x 1.9 x 0.7 inches without holster
Weight ...................................................................................................................................... 46 grams
....................................................................................................................................................... 1.6 oz
Casing Standards ................................................................................................................... Dust Proof
Working Temperature ..........................................................................................................-10 to +50°C
Storage Temperature ..........................................................................................................-20 to +60°C
Working Humidity .......................................................................... Up to 95% @ 50°C (non condensing
ESD ........................................................................................................................... Better than ± 12kV
Programming ..................................................... Programming lead and software or manually on pager
4.4 RF Specification
Local frequency ........................................................................... 1
st
Local 21.4 MHz, 2
nd
Local 455 kHz
Local oscillation ................................................... 1
st
Local PLL synthesized, 2
nd
local crystal controlled
Non Tuning Frequency Spread ............................................................................... ±4MHz (8Mhz total)
Sensitivity .............................................................................................. 512bps 5uV/m, 1200bps 7uV/m
Pass Bandwidth ......................................................................................................................... ± 3.0kHz
Modulation ........................................................................................... ± 4.5kHz DC modulation @ NRZ
Selectivity ................................................................................................... Better than 60dB @ ±25kHz
Spurious Rejection ....................................................................................................... Better than 50dB