CPT7 Electrical and Environmental Specifications

CPT7 Environmental Specifications

Operating Temperature

-40°C to +71°C

Storage Temperature

-40°C to +85°C

Humidity

95% non-condensing

Submersion

2 m for 12 hours (IEC 60529 IPX8)

Water Resistance

MIL-STD-810H, Method 512.6

Dust Resistance

MIL-STD-810H, Method 510.7

IEC 60529 IP6X

Random Vibration

MIL-STD-810H, Method 514.8, Category 24, 7.7 g RMS

Sinusoidal Vibration

IEC 60068-2-6

Bump

IEC 60068-2-27 Ea (25 g)

Shock – Operating

MIL-STD-810H, Method 516.8, Procedure 1, 40 g, 11 ms terminal sawtooth

Acceleration

MIL-STD-810H, Method 513.8, Procedure II (G Loading - 15 g)
CPT7 Power Requirements

Voltage

+9 to +36 VDC

Power Consumption

9 W typical, all constellations, all frequencies, plus L-Band

These are typical values using serial ports without interference mitigation. These values can change with the number of satellites in view, firmware version, data logging rates and features in use. Use them as a guide for what you might expect but not as absolute values

Inrush Current

5 A for less than 1.3 ms (@ 12 V; typical)
CPT7 RF Input/LNA Power Output

Antenna Connectors

SMA female, 50 Ω nominal impedance

Cascaded antenna
LNA gain (before receiver)

Firmware 7.04 or later

HDR disabled

+15 dB to +55 dB, 26 dB typical

HDR enabled

+20 dB to +55 dB, 30 dB typical

Firmware before 7.04

HDR disabled

+15 dB to +40 dB, 26 dB typical

HDR enabled

+20 dB to +40 dB, 30 dB typical

RF Input
Frequencies

GPS L1:

GPS L2:

GPS L5:

1575.42 MHz

1227.60 MHz

1176.45 MHz

GLONASS L1:

GLONASS L2:

GLONASS L3:

1593-1610 MHz

1237-1254 MHz

1202.025 MHz

Galileo E1:

Galileo E5a:

Galileo E5b:

Galileo E5:

1575.42 MHz

1176.45 MHz

1207.14 MHz

1191.795 MHz

BeiDou B1I:

BeiDou B1C:

BeiDou B2I:

BeiDou B2a:

BeiDou B2b

1561.098 MHz

1575.42 MHz

1207.14 MHz

1176.45 MHz

1207.14 MHz

L-Band:

1545 to 1560 MHz (CPT7)1

1525 to 1560 MHz (CPT7700)

LNA Power

+5.0 VDC ±5%, 0 mA to 200 mA (supplied by receiver through center conductor of RF connector).
CPT7 Wheel Sensor Input Signal Levels

Parameter

Symbol

 

Conditions

Minimum

Typical

Maximum 

Input Current

IIN

VCC = 0 V, 3.6V, 5.5 V

VIN = +12 V

 

80 µA

125 µA

VIN = -7 V

-100 µA

-50 µA

 

Receiver Differential
Threshold Voltage

VTH

-7 V ≤ VCM ≤ + 12 V2

-200 mV

-125 mV

-50 mV

Receiver Input
Hysteresis

ΔVTH

VA + VB = 0 V

 

15 mV

 

There is a 100Ω termination resistor across the DMI_A+ and DMI_A- inputs.