conference meeting Equipment, dual modulators
General Description
The SI 1015 modulator accepts line level input via an XLR connection and drives the SZI 1015 (medium area) and SZI 1029 (large area) emitter panels. By generating higher than usual sub-carrier frequencies, the SI 1015 avoids the interference generated by electronically-ballasted fluorescent lights. A selector switch can be set for single or dual-channel operation, and the SI 1015’s external power supply provides DC power for two SZI 1015 emitters or one SZI 1029-24.
Features
- New, higher sub-carrier frequencies to avoid interference
- Rack-mountable
Delivery Includes
- SI 1015
- 2 rack-mount ears
- NT 1015-120 power supply
conference meeting Equipment, dual modulators
Technical Data
| XLR connector |
2 x XLR-3 symet. |
| Carrier frequency |
2.3 MHz / 2.8 MHz |
| Current consumption |
<140 mA |
| Dimensions |
1/2 19-inch, 1 U (224x44x173 mm) |
| Impedance |
600 Ω |
| Input voltage range |
10 mV - 5 V (Line) |
| Modulation |
FM |
| Nominal deviation |
± 40 kHz |
| Operating voltage (mains) |
24-30 V DC |
| Peak deviation |
± 56 kHz |
| RF output |
2 x BNC |
| Weight |
1.8 lbs. (800 g) |
conference meeting Equipment, dual modulators
Recommended Accessories
| Part/Accessory |
Article No. |
| NT 1015-120 |
004561 |
29V DC power supply for SI1015, SZI1015 or SZI1015-T
|
conference meeting Equipment, dual modulators
Variants
Glossary
| Impedance |
| Impedance expresses the AC resistance of a microphone or a set of headphones. It is dependent on frequency and is given at 1 kHz as the so-called nominal impedance. Impedance is measured in ohms. In recent years, an industrial standard has developed, setting the impedance of headphones at 50 or 600 ohms. Sennheiser headphones are manufactured according to this standard, thus practically ruling out connection problems. With microphones, the input impedance of the following microphone amplifier should have at least three times the value of the nominal impedance, in order to prevent it from unnecessarily attenuating the microphone signal. |
| Input voltage range |
| Indicates the voltage range of the input signal within which a unit will work properly, i.e. as specified in its technical data. |
| Modulation |
| The process in which one wave is varied by some parameter of another wave, for example, an RF carrier frequency that is modulated by an audio signal. Types of modulation include amplitude modulation, frequency modulation, pulse code modulation and pulse width modulation. |
| Nominal deviation |
| Also known as reference deviation. The nominal deviation has been fixed at 40kHz to be able to give comparable technical data. |
| Operating voltage (mains) |
| Gives the (mains) voltage range for which a unit has been designed. |
| Peak deviation |
| Maximum permissible deviation for FM. |
| RF output |
| Socket for feeding the transmitter signal to the antenna (system). Rack-mount transmitters most commonly feature a BNC type connector; for bodypack transmitters, various types of connectors are used. |
