14
UB99
1. Preparation
1) Measuring instrument: Oscillator
Distortion meter
Level meter
2) Jig: USB cable, P.C (Personal computer)
3) Connections of terminals are shown as follows:
INPUT
Monaural Input 1/4 inch Plug (Signal Input)
OUT L/
MONO
Monaural Output 1/4 inch Plug (RL 47K
Ω
)
OUT R
Monaural Output 1/4 inch Plug (RL 47
Ω
)
AC IN
AC ADAPTOR (AC-10)
USB
USB Cable
/
P.C.
INPUT
LEVEL
HIGH(+10dB) / LOW(0dB)
2. Measurement Conditions
Unless otherwise specified, input signals are of
sinusoidal waves and the frequency is 1 kHz.
Before turning on power, set knobs of Control VR1,
Control VR2 and Control VR3 at positions near their
respective Centers.
Set Output VR to MAX and Input Level SW to Low.
Make sure that the input impedance of the measuring
instrument is 1 M
Ω
or greater.
Install USB-MIDI driver on the P.C.
3. Method of Inspection
3-1. How to get TEST MODE
When turning on power while pushing [Å|] SW and [Å{]
SW, you will get TEST MODE.
Proceed with inspection according to the instruction in
the following display.
Make sure that the back light SED of LCD is lit.
INSPECTIONS / FACTORY SET
UB99
P.CHEK
V1.0
PUSH
[ON/OFF]
SW
3-1-1. DSP & DRAM & AD/DA Check
Push [ON/OFF] SW. The following display appears.
Make sure that a signal wave is outputted.
3-1-2. Electrical characteristics
U B99 DSP&DRAM
PUSH [ON/OFF] SW
Item
Input terminal, Conditions Output terminal, Specifications
1: Input
INPUT
OUT L/MONO
sensitivity
-4.5dBm(1KHz)
0dBm
±
3dB
2: ditto
INPUT
OUT L/MONO
-4.5dBm(10KHz)
0dBm
±
3dB
3: ditto
INPUT
OUT L/MONO
-4.5dBm(100Hz)
0dBm
±
3dB
4: ditto
INPUT
OUT R
-22.5dBm(100Hz)
0dBm
±
3dB
5: ditto
INPUT
OUT R
-22.5dBm(10KHz)
0dBm
±
3dB
6: ditto
INPUT
OUT R
-22.5dBm(1KHz)
0dBm
±
3dB
7: ditto
INPUT
OUT R
-33dBm(1KHz)
0dBm
±
3dB
INPUT LEVEL HIGH
8: ditto
INPUT
OUT L / MONO
-15dBm(1KHz)
0dBm
±
3dB
INPUT LEVEL HIGH
LOW after completion
9: NOISE
INPUT
OUT L / MONO
LEVEL
Pull Out Plug
-44 dBm or less
10: ditto
INPUT
OUT R
-44 dBm or less
11: Distortion INPUT
OUT R
factor
-12dBm(1KHz)
0.5% or less
Push Insert Plug
12: ditto
INPUT
OUT L / MONO
+6dBm(1KHz)
0.5% or less
