Pardew, who is due to return from a touchline ban on Monday, told Sky Sports News: "When you lose five games in the Premier League, if you can't accept that there's going to be some speculation about your job, then you are not being realistic.
"I have to be realistic, but what I won't do is focus away from what I do. I have worked really hard this week with the team and really focused on the team to make sure we put a performance in at Arsenal that we can be proud of.
"The situation, the longer-term here, looks good, but in the short term, we need to put it right."
Newcastle face Arsenal at the Emirates Stadium on Monday evening.