JRC GPS-Rx CCA-191P (with direct DGPS)

There seems to be no technical data about this rx all over the internet. So I took the papers I got with my rx and here you can see the result. Here are details of the used data format.

Sometimes I'm in doubt about the English they used, but I wrote it down 'as it is'.


8 channel parallel all-in-view positioning

Simultaneously, by receiving up to 8 satellites parallelly and by making position to employ information of all received satellites (all-in-view positioning technology), it is possible to attain high accuray positioning.

two satellite positioning

Even if three satellites which are normaly necessary for positioning are not received, with two satellite reception, it is possible to make positioning where short time blockage of satellites.

DGPS capability

With intake of GPS satellite correction data which is generated at the reference station, it is possible to make high accuracy postioning drastically.

small light-weight pack type

It is 40% down-sized than the previous model. to save associate materials for integration and improve reliability, it can be installed on the Customer's board, which does not require pin connector and connection cable. With direct antenna connection to the receiver unit, inner antenna coaxial cable together with connector is not required anymore.


By containing the receiver board in the aluminium box, it minimizes its electro-magnetic generation.


Receiving Unit


Receiving method 8 channels
Receiving frequency 1575.42 MHz (L1), C/A code
Sensitivity -130 dBm (Antenna input level of antenna system as described)
Dynamic range More than 25 dB
  • Horizontal position
100m 2DRMS (HDOP<3, SA on, without Direct DGPS, final GPS system accuracy
  • Speed
0.9 m/s RMS
Dynamic capability  
  • maximum velocity
680 km/h
  • maximum acceleration
2 g
Position calculation interval normally 1 s
Fixing calculation use all satellites tracked
Time to first fix (no signal loss)  
 a) Hot TTFF 21 to 56s
with initial position, time, date, almanac and ephemeris data.
Condition of maximum TTFF is twice detection failure of satellite signal.
 b) Warm TTFF 33 to 130s
with initial position, time, date, almanac data (no ephemeris data).
Condition of maximum TTFF is twice detection failure of satellite signal.
 c) Cold TTFF 95s to 11min
with no data
Re-acquisition time Average 8s after signal obstruction of less than 10s
Modes of operation Automatic selection of 2D/3D
Data Interface TX1, RX1 TTL direct connection, 4800Bd
Data Interface RX2 TTL direct connection, 4800Bd (?)
Input data for direct DGPS (RX2 port) Specified by RTCM SC104 Version 2.0
Note: only Type I and Type II data are used for correction calculation (1200Bd, no parity, 1 stop bit)
Age of differential DGPS data limit If correction ceases for receiving, the values in use will continued to be treated as valid for a further 30s
RF connector SMB (same as UM type made by HIROSE)
Power requirement  
 a) Main (operating) DC +5V +/- 0.25V, ripple within 10mVp-p
210mA typ., 1.05W typ. (w/o antenna)
 b) Back up (standby) DC +2.2 to 3.6V (no Li battery on GPS board), 60A maximum
Available power for antenna preamp. DC +4 to 5V, 10mA to 30mA
Antenna Failure  
 a) Short detection more than 30mA
 b) Open detection less than 10mA


  41.0mm x 86.0mm x 24.5mm (w/o connector)


 Operating temperature -10C to +60C
 Storage temperature -30C to 85C

Antenna system requirements

An antenna with a preamplifier is available from a variety of our selections. However, if the customer provides, the following are the specifications in case that the loss of coaxial cable between praamplifier and RF input of CCA-191P is less than 7dB.

Antenna with preamplifier

Frequency 1575.42+/-1MHz
Gain (antenna) > -5dBi (0 to 85 deg.)
Gain (preamplifier) 32dB +/- 3dB
Noise figure (preamplifier) 1.5dB max.
Power supply DC +3.9V or more at 30mA
DC +5.1V or below at 10mA
Output VSWR 1.5 max.
Output impedance 50 Ohms


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