BTX-121 (190-1202) Specifications Faxback Doc. # 8796
MEASUREMENT CONDITIONS
Power Source......................................................8.4V DC
Antenna Impedance..................................................50 ohm
Microphone.......................................................Electric
Speaker........................................................8 ohm/0.5W
Two Switchable Channel.............................................A or B
Installed CH-A Frequency.......................................154.600MHz
Frequency Range.................................................+/-2.5MHz
Channel Space.......................................................30kHz
Audio Output Load...................................................8 ohm
Temperature..................................................77 degrees F
Crystal Oscillation........................................TX Fundamental
Receiver Unit Nominal Limit
Sensitivity 12 dB SINAD microV 0.25 0.5
Sensitivity 20 dB NQS microV 1 2
Squelch Sensitivity Threshold microV 0.25 0.5
Squelch Sensitivity Tight microV 1 2
Squelch Hysteresis Threshold dB 3 2
Squelch Control Range dB 10 8
Spurious Response 2F-1st IF dB 70 60
ACA Selectivity +/-30kHz dB 60 54
Image Rejection 1st/2nd IF dB 50 48
S/N Ratio 1 mV Input dB 30 30
THD 1 mV 1 kHz % 5 5
Maximum Power 1mV Input mW 300 250
10% THD Power 1mV Input mW 200 200
Frequency Response 300/1k/2k/3kHz EIA STANDARD
Minimum Operation Voltage V 6.5 7.0
Current Drain No Signal mA 40 50
Current Drain Maximum Power mA 80 100
TRANSMITTER SPECIFICATION LIMITS
Transmission Frequency MHz +/-0.0025
RF Power Output (HI/LOW) W 1/0.6 +/-0.2
Input Level 3kHz Deviation mV 10 10
Modulation Distortion 1k/3kHz Deviation % 5/9%
Modulation Frequency Response EIA STANDARD
AMC Range from 3kHz Maximum Deviation dB 20 15
Current Drain No Modulation mA 400 500
Minimum Operation Voltage V 6.5 7.0
2nd/3rd/4th/5th dB 45 43
6th/7th/8th dB 45 43
Ft+Ft/Ft+2Ft/Ft+3Ft dB 45 43
Ft-Ft/Ft-2Ft/Ft-3Ft dB 45 43
Note: Nominal specs represent the design specs. All units should be
able to approximate these - some will exceed and some might drop
slightly below these specs. Limit specs represent the absolute
worst condition that still might be considered acceptable; in no
case should a unit fail to meet limit specs.
TRANSMITTER:
Frequency Coverage...................................151.250 to 156.255MHz
Frequency Tolerance............................................+/- 2.5 kHz
Type of Modulation......................................................FM
RF Power....................................................HI 1W, LO 0.5W
Deviation.........................................................+/- 5kHz
Spurious Rejection...................................................48 dB
Minimum Operating Voltage.............................................7.5V
RECEIVER:
Sensitivity (Sinad 12 dB)......................................... 0.5 uV
Signal-to-Noise Ratio (20 dB)......................................0.75 uV
AF Power Output......................................................350mW
Current Drain........................................................150mA
Adjacent Channel Rejection............................................50dB
Squelch Sensitivity (Start).........................................0.4 uV
Stop Voltage............................................................5V
Distortion (1 mV Input 4.3 kHz).........................................6%
GENERAL:
Power Supply..................................................8.4 Volts DC
Antenna Gain.........................................................Unity
Antenna Length.......................................................150mm
Dimensions..................................2-1/2 x 1-1/2 x 6 inches (HWD)
(65 X 35 x 160 mm)
Weight.....................................................14.11 oz (400g)
RADIO CRYSTAL
Package Type.......................................................HC 50/T
Load Capacitance.....................................................20 pF
FCC CLASSIFICATION
Emission...........................................................20K0F3E
Station Class...........................................................MO
Specifications are typical; individual units might vary. Specifications
are subject to change without notice.
(BR/ir-09/18/95)
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