Marantz PMD680 manual Selection and Manipulation of Input Source, Recording

RECORDING

Selection and Manipulation of Input Source

Input Source Selection

Input source is selected from external XLR microphone connector input, 1/4" microphone connector input, internal microphone input, line input, and telephone input.

OFF	ON	1	2/INT	SP	MP
					LP
SPEAKER		MIC		REC MODE
LIMITER				0dB	-15dB
ALC	MANUAL	TEL	LINE		-30dB
REC LEVEL		INPUT		MIC ATTEN
		OFF	ON		FLAT
OFF	LOCK
KEY LOCK		PRE REC			ANC

INPUT LEVEL switch selects from telephone input, microphone input, and line input. Only when INPUT LEVEL switch is at the MIC INPUT position, MIC INPUT switch becomes effective. XLR microphone connector input is assigned to "1" position of MIC INPUT switch. 1/4" microphone connector input and internal microphone input are assigned to "2 / INT MIC" position of MIC INPUT switch.

If a microphone plug is inserted into the 1/4" microphone connector, the input from the 1/4" microphone connector becomes effective. If a microphone plug is not inserted into the 1/4" microphone connector, the input from the internal microphone becomes effective.

Effective microphone input

MIC INPUT
switch position	1	2 / INT MIC
1/4" connector
Inserted	XLR microphone	1/4" microphone
	connector input	connector input
Not inserted		Internal Microphone
		Input

MIC ATTENUATION

MIC ATTENUATION is effective only for the signal from external microphone inputs, i.e. XLR microphone connector input and 1/4" microphone connector input. MIC ATTENUATION is NOT effective for the signal from internal microphone inputs and line input.

OFF	ON	1	2/INT	SP	MP
					LP
SPEAKER		MIC		REC MODE
LIMITER					-15dB
ALC	MANUAL	TEL	LINE	0dB	-30dB
REC LEVEL		INPUT		MIC ATTEN
		OFF	ON		FLAT
OFF	LOCK
KEY LOCK		PRE REC			ANC

0dB (no attenuation), -15dB attenuation, and -30dB attenuation of the microphone input is selected by MIC ATTENUATION switch. Mic attenuation is used to normalize the difference in sensitivity of the external microphones and realize the best S/N ratio in recording.

Ambient Noise Control

ANC (Ambient Noise Control) is effective for all microphone input and telephone input, but is not effective for line input.

OFF	ON	1	2/INT	SP	MP
					LP
SPEAKER		MIC		REC MODE
LIMITER					-15dB
ALC	MANUAL	TEL	LINE	0dB	-30dB
REC LEVEL		INPUT		MIC ATTEN
		OFF	ON		FLAT
OFF	LOCK
KEY LOCK		PRE REC			ANC

This function filters out unwanted frequencies for

recording.
• Band-pass (	) : Cuts low frequency (150Hz and
lower) and high		frequency (3KHz and higher)

•Flat : No filtering

•Low-cut ( ) : Cuts low frequency (150Hz and lower)

REC LEVEL

For all inputs (external microphone, internal microphone, line), three ways of level control are selected by REC LEVEL switch

•ALC (Automatic Level Control): Automated recording level adjustment based on the level of the input signal (REC LEVEL knob does not effect the recording).

Time constant is long to prevent sudden fluctuations in the recording level.

•LIMITER: Although the recording level must be adjusted by REC LEVEL knob, signals over 0VU trigger an automatic reduction of the recording level. Time constant is short to provide quick restoration of the manually set recording level.

When limitter works (at signals over 0VU), REC LED also dimms as a noticeable warning.

(Refer to Recording Indication on page xx)

•MANUAL: Recording level must be adjusted manually using the REC LEVEL knob.

Effective Manipulation for Inputs

	Manipulation	MIC	ANC	REC LEVEL
Input		ATTENUATION	(Ambieent Noise	(ALC, LIMITTER,
			Control)	MANUAL)
Telephone Input		Not effective	Not effective	Effective
	XLR microphone	Effective	Effective	Effective
	connector input
MIC	1/4" microphone	Effective	Effective	Effective
	connector input
	Internal	Not effective	Effective	Effective
	microphone Input
Line Input		Not effective	Not effective	Effective

Recording Level Adjustment

For the input on which REC LEVEL is effective (refer to the above table), recording level should be adjusted using LEVEL KNOB. Watching the audio level meter and monitoring the input sound, use the REC LEVEL knob to adjust the audio level meter so that the 0dB indicator just barely flicker at the highest peak of the input sound level. The OVER indicator should not light (this would result in clipping).

10