ZYT GPSDO Series are Mainly Divided into Three Types:
GPSDO-1: Module for Trimble
GPSDO-2: Module for SYMMETRICOM
GPSDO-3: Module for SAMSUNG

GPSDO-1 Upgrades:
1. Sine wave 10MHz (optional start-up forced output. Disabled by default) is convenient for audiophiles to use. You can set start time by yourself through serial port command. (Please leave a message if you need us to set up on your behalf).

2. LCD backlight shutdown function. Through serial port, you can set 0-3600 seconds to turn off the LCD backlight. (The default is 600 seconds to turn off the backlight). After turning off backlight, any key to turn on the backlight.

How many seconds it takes to close can be modified on your behalf. Those who can use the serial port can return to the instruction set through the (help?) instruction, follow the instructions in the instruction set and fill in the corresponding numerical settings.

Turning off the backlight saves energy while solving long-term light pollution problem for audiophiles.

3. LCD contrast can be adjusted by serial port commands and set according to personal preference. Default coarse adjustment 36 (range 32-39) and default fine adjustment 18 (range 0-63).

4. Use the instruction HELP to get the module instruction set.

GPSDO-1 Module For Trimble:
- This GPSDO has excellent playability. Its algorithm is the most mature and reliable one.
- When the antenna is locked, 24-hour average accuracy reaches 10-12th power, which is equivalent to 10.000 000 000 01MHz =0.000001ppm=0.001ppb.
- In the case of not connecting the antenna, it can still maintain 2*10-10th power every day, maintaining a very high level.
- It has the function of saving coordinates, which greatly saves the time of surveying coordinates.
- With output frequency statistics display function.
- We will energize and lock the satellite for a week for each clock, which greatly optimizes aging. Ensure that high accuracy can be maintained even when the antenna is not connected.

Accessories A Set:
- Suitable for environments with good antenna conditions
- A Set of Power Adapter Input AC100-240V Output 12V 5A
- A BNC To BNC Cable 0.5m/1.64ft + A BNC To S-MA Cable 0.5m/1.64ft
- A GPS Antenna 5m/16.4ft

Product Features:
- The antenna must ensure at least 50% of the sky to be able to lock well. Not easy to lose lock after locking.
- Power consumption: start 10-24V, <1.5A; after stable <0.8A
- Configure DB9 serial communication
- Sine wave output port S-MA 10MHZ SINE 50Ω ≈1.4VPP ≈7dBm
- 1pps output second pulse S-MA port
- Square wave output port BNC*2, 10MHz measuring impedance 50 ohms ≈1.4VPP, 1M ohms ≈3.3VPP
- Antenna ANT S-MA port 5V can be connected to GPS active antenna. GPSDO provides 5V voltage for antenna
- The screen displays a variety of status information
- LCD backlight is available in blue and white
- Time information: Default UTC time, which can be changed to other times (such as Beijing time)
- Satellite information: Visible satellites, Locking satellites, Tracking satellites
- PPS deviation output state
- Various conditions such as internal temperature
- Connect to computer and use third-party software for Lady Heather to view more information. Including GPS satellite tracks.

Package Included:
- 1 x GPSDO
- 1 x Set of Power Adapter Input AC100-240V Output 12V 5A
- 1 x BNC To BNC Cable 0.5m/1.64ft
- 1 x BNC To S-MA Cable 0.5m/1.64ft
- 1 x GPS Antenna 5m/16.4ft