D00864900A G-25U Master Clock Generator/Up-converter Owner’s Manual
Features Up converter function G-25 has the very highly accurate internal crystal master clock and ESOTERIC original DSRLLⅢ circuit. This reduces the audible frequency digital jitter to less than 1/100 level. Even though the connected component has no WORD SYNC IN terminals, The G-25U can provide highly accurate digital signals regenerated by the internal crystal clock. The signal is convertible up to 192kHz.
Before Use What’s in the box Please confirm that the following accessories are in the box when you open it. Power cord x 1 Felt x 3 Warranty card x 1 Owner's manual x 1 Read this before operation As the unit may become warm during operation, always leave sufficient space around the unit for ventilation. The voltage supplied to the unit should match the voltage as printed on the rear panel. If you are in any doubt regarding this matter, consult an electrician.
Connection CAUTION: ・ ・ Switch off the power to all equipment before making connections. Read the instructions of each component you intend to use with this unit. CD drive unit, etc. Balanced XLR pin assignment RCA coaxial digital cable BNC cable 75Ω BNC cable 75Ω BNC cable 75Ω Supplied power cable Reference frequency signal output terminal Rubidium master clock generator, etc. DIGITAL IN D/A converter, etc.
A. WORD CLOCK OUT terminals [WORD CLOCK OUT] These terminals output word synchronization signals. Connect these OUT terminals to the WORD SYNC IN terminals of the other digital devices (CD Transport, D/A converter, etc.), using a commercially-available BNC coaxial cable (impedance: 75Ω). ・The G-25U has three separate output systems (system A, B and C) which can separately output 1x, 2x, and 4x multiples of the base frequency series (44.1 kHz, 48 kHz).
Name of Each Control A. POWER Use this to turn up the unit on and off. When the unit is on, the ring surrounding the button lights up. B. Up converter Input select switch Use this switch to select the digital inputs. The indicator LED lights up according to the selected input lines. C. UP CONVERT button Use this switch to select the sampling frequency of up/down-conversion. The digital output signal is converted (44.1/88.2/176.4 or 48/96/192) according to the base frequency series (44.
Set Up #1 Master clock function 1. Connect WORD CLOCK OUT terminals to WORD SYNC IN terminals of each component you intend to use with this unit, using a commercially-available BNC coaxial cable. ・ Read the instructions of each component to connect other audio signal line 2. Turn on the power using the POWER button on the main unit. The ring surrounding the button and each indicator LED light up. 3. Press MASTER button to select the base frequency. 44.1kHz: for CD playback 48kHz: for DVD playback 4.
Set Up #1 Up-convert function This unit can convert input signal from digital input terminals to up/down converted sampling frequency digital signals. 1. Turn on the power using the POWER button on the main unit. Read the instructions of each component to connect other audio signal line 2. Press INPUT to select the line which digital component is connected. 3. Press UP CONVERT button to select the output sampling frequency. 44.1/48 ↓ 88.2/96 ↓ 176.4/192 ↓ 88.2/96 DUAL ↓ 176.4/192 DUAL ・ 88.
Troubleshooting No power. →Check the connection to the AC wall outlet. Make sure the outlet is not switched by a lamp switch by plugging in another electrical device to see if the outlet is “live”. →Press the POWER switch of the unit to turn it on. Word sync does not work. →Frequency of the output word clock may be invalid to the connected components. Change the frequency setting to match that of each component.
