Triton

Triton USB Audio

The Triton is a compact and robust USB Audio device. It was designed with Dirac in mind, but can also be used in many other applications. USB's Plug & Play architecture and the compatibility with native Microsoft™ Windows™ and Apple Computer™ OS X drivers enable instant use without driver installation.

The features that make the Triton particularly suited to acoustic measurements with Dirac, are the overload indicator and the lack of any volume controls that could interfere with repeatable calibrated measurements.

Each individual Triton is supplied with a measurement report of the accurate full scale input and output voltage levels at 1 kHz.

Attenuator cable

To attenuate the input voltage or to increase the input impedance, you can use an input series resistor, which forms a voltage divider with the Triton input impedance. The table below shows the attenuation for some standard E96 series resistors. You can mount yourself resistors in the cable plugs, or order attenuator cables from Acoustics Engineering.

Input attenuation and impedance versus series resistor
Series resistor [kΩ] Input attenuation [dB] Input impedance [kΩ]
0 0 18.5
7.68 3.0 26.1
18.2 6.0 36.7
40.2 10.0 58.7
165 20.0 183.5

An input gain exceeding 0 dB is available on request. The additional gain will add a single pole/zero high-pass cutoff in the input frequency characteristic. The cutoff frequency is given for several gains in the table below.

Additional high-pass cutoff frequency versus input gain
Input Gain [dB] High-pass Frequency [Hz]
0 0
3 0.4
6 0.9
10 2
20 8

 

Download

You can download the Triton datasheet including all specifications as a pdf.

Download

Features

Triton
  • Fully specified analog input and output characteristics. Measurement report included.
  • Phase-synchronous sampling of analog input and output.
  • Fully compliant with USB 1.1 specification.
  • USB-bus powered.
  • Indication of analog input overload, power and USB.
  • Extremely compact, easy to carry design in robust, fully shielded massive aluminium housing.
  • No manual controls, ensuring reproducible measurements.
  • Includes USB cable and protective leather pouch.
  • Driverless installation on Windows and other operating systems.

Specifications

Specifications @ TA = 25 ºC, fs = 48 kHz, fin = 1 kHz, fout = 1 kHz, 16 bit data, 0 dB input gain, unless otherwise noted.
Parameter Condition Min Typ Max Unit
  1. A measurement report on the input and output full scale voltage levels at 1 kHz is provided with each individual Triton.
  2. Because system measurements are often performed by generating an excitation signal at the output, while recording the system response at the input, measurement system quality parameters depend on the Triton input + output chain. Therefore these parameters are given for the loopback configuration depicted in figure 2.
Input 1,2
Input voltage1) Full scale peak voltage
Nominal RMS level
Headroom at nominal RMS level
Allowable AC voltage
Allowable DC voltage
1.95
-6.2
 
 
-10
2.00
-6.0
12
 
 
2.05
-5.8
 
25
10
V
dBV
dB
V
V
Overload voltage 1.38
-0.2
1.41
0.0
1.43
 
Vrms
dB
Input impedance
(see figure 1)
18.3 18.5 18.6 kΩ
Frequency range
(see figure 3)
dB re 1 kHz level
+0.04...-0.06
+0.05...-0.25
+0.05...-0.95
+0.05...-3.0
dB re median level
±0.05
±0.15
±0.5
±1.5
 
60
20
9
4
 
22 k
23 k
23 k
23 k
Hz
Resolution 18, 16 bit
Sample frequency 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz
Output 1,2
Output voltage1) Load impedance = 10 kΩ
Full scale peak voltage
Nominal RMS level
Headroom at nominal RMS level
Allowable DC voltage
 
1.95
-6.2
 
-2
 
2.00
-6.0
12
 
 
2.05
-5.8
 
2
 
V
dBV
dB
V
Load impedance Nominal
2 outputs simultaneously, each output
1 output at a time
 
1
0.5
10
 
 
kΩ
Output impedance
(see figure 1)
104 107 110
Frequency range
(see figure 4)
dB re 1 kHz level
+0.1...-0.1
+0.1...-0.5
+0.1...-0.9
+0.1...-2.9
dB re median level
±0.1
±0.3
±0.5
±1.5
 
7
4
3
2
 
14 k
19 k
21 k
21 k
Hz
Resolution 18, 16 bit
Sample frequency 32, 44.1, 48 kHz
Loopback2)
SNR Full scale / Silence, unweighted 0...24 kHz 87 dB
Crosstalk Channel 1 to 2, vice versa, 0...24 kHz -85 dB
THD+N Full scale, input + output 2) -80 dB
USB
Compatibility USB 1.1
Power consumption 1 unit load
Connector USB-B
Cable length Supplied cable 1.8 m
General
Supply current Ouput load impedance: 2 x 1kΩ, full scale sine wave. Input overload LEDs on 70 85 mA
Audio connectors RCA Phono
Dimensions w x h x d 82 x 22 x 40 mm3
Weight 105 g
Triton input/output circuit

Figure 1. Equivalent input and output circuits

Triton loopback circuit

Figure 2. Loopback configuration

Triton input characteristic

Figure 3. Typical input frequency characteristic

Triton output characteristic

Figure 4. Typical output frequency characteristic

Accessories

The Triton package contains a Triton USB audio interface, an LP03 leather pouch, a CA03 USB cable assembly, a manual and a measurement report. An optional accessory is the CA04 attenuator cable assembly.

CA04 Attenuator cable

CA04-xxY attenuator cable assembly. Attenuates the applied input signal and increases the Triton input impedance. Length about 13 cm. Attenuation and connector color on demand, using the code in the order number. The default attenuation (omitting xxY) is 10 dB and the default connector color is black.

Y = color. Y = B Black. Y = R Red

xx = attenuation in dB:
xx = 00 attenuation = 0 dB. input impedance = 18.5 kΩ (extension cable)
xx = 03 attenuation = 3 dB. input impedance = 26.1 kΩ
xx = 06 attenuation = 6 dB. input impedance = 36.7 kΩ
xx = 10 attenuation = 10 dB. input impedance = 58.7 kΩ
xx = 20 attenuation = 20 dB. input impedance = 183.5 kΩ

Ordering

The Triton can also be ordered from Brüel & Kjær as part number ZE-0948.

All prices are inclusive of shipping and handling costs. You can pay by credit card through PayPal.
Item Price  
Triton package, including LP03 and CA03 € 320,-
CA04 attenuator cable, att.  dB,  € 20,-